#  Origins Forum - The Compositions of Small Exoplanets (David Charbonneau) 

 



####  calendar\_today Date and Time 

 **September 16, 2015** 

 04:00PM - 04:00PM EDT 

####  pin\_drop Location 

 **Haller Hall**  



 

 



 

The NASA Kepler Mission demonstrated that planets larger than Earth yet smaller than Neptune are a commonplace in the galaxy. Until recently, we knew nothing about their masses and, by inference, their compositions. I report on what we've learned from the first 3 years of the HARPS-N survey, which aims to understand the transition from rocky planets, composed of rock and iron, to Neptune-like worlds, which have accreted an envelope of primordial H/He gas. I will explain the role of the NASA Transiting Exoplanet Survey Satellite (TESS), scheduled for launch in 2017.



 

 



 

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